Automatic welding device for large workpieces

Abstract

The utility model provides an automatic welding device for a large-sized workpiece, which can automatically weld the large-sized workpiece, does not need manual intervention to adjust the position of the workpiece, and is relatively high in safety. Comprising a three-axis platform and a welding robot installed on the three-axis platform, head and tail position changing machines are arranged at the two ends of the lower portion of the three-axis platform, connecting boxes are installed on the head and tail position changing machines, a rotating beam frame is connected between the lower portions of the connecting boxes at the two ends, and a rotating table is installed on the rotating beam frame; the rotary table is connected with a driving motor installed on the rotary beam frame, a bottom plate is installed on the rotary table, a workpiece is arranged on the bottom plate, and a positioning assembly used for positioning the workpiece is arranged on the bottom plate.

Description

Technical Field

[0001] The utility model relates to the technical field of welding, in particular to an automatic welding device for large workpieces. Background Art

[0002] For large workpieces such as sand boxes, manual hoisting is usually adopted and coordinated with a robot for welding. However, the hoisting will tilt, which will lead to welding deviation, and it is difficult to ensure that the path trajectories of the welding robot are the same each time, resulting in the failure of workpiece welding. If manual intervention is used to adjust the position each time to make it the same as the theoretical position, this will be a very difficult thing to achieve, especially when the workpiece is relatively large, and the operability is very poor. Then, it is necessary to re-find the position, re-adjust the program, and re-test the welding trajectory before the robot welding, which will greatly reduce the efficiency. In addition, during the hoisting and welding operation, once the cooperation is improper or the hoisting method is inappropriate, accidents such as workpiece dropping often occur. Also, due to the large size and weight of the workpiece, it often causes damage to the workpiece and surrounding equipment after dropping, and even causes personal injury accidents. Content of the Utility Model

[0003] In view of the above problems, the utility model provides an automatic welding device for large workpieces, which can realize automatic welding of large workpieces without manual intervention to adjust the position of the workpiece, and has relatively high safety.

[0004] The utility model adopts the following technical scheme: an automatic welding device for large workpieces, including a three-axis platform and a welding robot installed on the three-axis platform. At both ends below the three-axis platform, there are head and tail positioners. A connection box is installed on the head and tail positioners. A rotating beam frame is connected between the lower parts of the connection boxes at both ends. A rotating table is installed on the rotating beam frame. The rotating table is connected to a driving motor installed on the rotating beam frame. A bottom plate is installed on the rotating table. The workpiece is placed on the bottom plate. A positioning component for positioning the workpiece is arranged on the bottom plate.

[0005] Further, the positioning component is divided into a first positioning component and a second positioning component. The first positioning component and the second positioning component are assembled at intervals on the bottom plate on the outer circle of the workpiece.

[0006] Further, the first positioning component includes a stud, a bolt column, and a pressing plate. Through holes and waist-shaped holes are formed in the pressing plate. The top end of the stud passes through the through hole, and the top end of the bolt column passes through the waist-shaped hole and is locked by a nut.

[0007] Further, the second positioning component includes a retaining block. The retaining block is fixed on the bottom plate. A threaded hole is formed in the retaining block. A lead screw is threadedly connected in the threaded hole. A top block is installed at one end of the lead screw, and a screwing rod is installed at the other end of the lead screw.

[0008] Further, the three-axis platform includes an X-direction walking axis, a Y-direction walking axis slidably assembled on the X-direction walking axis, and a Z-direction walking axis slidably assembled on the Y-direction walking axis. The X-direction walking axis is installed on the gantry, and the welding robot is rotatably installed on the Z-direction walking axis.

[0009] The beneficial effects of the present utility model are that the welding robot is installed on the three-axis platform, and the walking actions in the X, Y, and Z directions can be realized. Moreover, through the arranged head and tail positioner, when the workpiece is placed on the rotating table, the angle position of the workpiece can be flexibly adjusted according to the situation, which is convenient for cooperating with the welding robot for welding. Thus, automatic welding is conveniently realized, and the existing hoisting welding risks are avoided. It has high safety and good use value. Description of the Drawings

[0010] Figure 1 is the structural schematic diagram of the present utility model;

[0011] Figure 2 is the assembly structural schematic diagram of the head and tail positioner in the present utility model;

[0012] Figure 3 is Figure 2 the enlarged structural schematic diagram at I in Detailed Embodiments

[0013] As Figure 1 、 Figure 2 、 Figure 3 shown, an automatic welding device for large workpieces of the present utility model includes a three-axis platform 1 and a welding robot 2 installed on the three-axis platform 1. At both ends below the three-axis platform 1, there are head and tail positioners 3. Specifically, the three-axis platform 1 includes an X-direction walking axis 4, a Y-direction walking axis 5 slidably assembled on the X-direction walking axis 4, and a Z-direction walking axis 6 slidably assembled on the Y-direction walking axis 5. The X-direction walking axis 4 is installed on the gantry 7, and the welding robot 2 is rotatably installed on the Z-direction walking axis 6; on the head and tail positioner 3, there is a connection box 8. Between the lower parts of the connection boxes 8 at both ends, there is a rotating beam frame 9 connected. On the rotating beam frame 9, there is a rotating table (not shown in the figure). The rotating table is connected to a driving motor (not shown in the figure) installed on the rotating beam frame 9. On the rotating table, there is a bottom plate 11. The workpiece 12 is placed on the bottom plate 11, and on the bottom plate 11, there is a positioning component for positioning the workpiece 12.

[0014] The positioning components are divided into a first positioning component 13 and a second positioning component 14. The first positioning component 13 and the second positioning component 14 are assembled at intervals on the bottom plate 11 on the outer circle of the workpiece 12. The first positioning component 13 includes a stud 15, a bolt column 16, and a pressing plate 17. Through holes and kidney-shaped holes 18 are provided on the pressing plate 17. The top end of the stud 15 passes through the through hole, and the top end of the bolt column 16 passes through the kidney-shaped hole 18 and is locked by a nut 19. The pressing plate 17 is sleeved on the stud 15 and the bolt column 16, and is locked by a nut after the pressing plate 17 presses against the bottom step surface of the workpiece 12. The second positioning component 14 includes a retaining block 20. The retaining block 20 is fixed on the bottom plate 11. A threaded hole is provided in the retaining block 20, and a lead screw 21 is threadedly connected in the threaded hole. A tightening block 22 is installed at one end of the lead screw 21, and a screwing rod 10 is installed at the other end of the lead screw 21. For workpieces of different sizes, the lead screw 21 is screwed until the tightening block 22 presses against the side surface of the workpiece.

[0015] The utility model can realize the walking actions in the X direction, Y direction, and Z direction through the head and tail displacement machine 3 and the rotating table, and cooperate with the three-axis platform 1, can realize the multi-angle rotation welding of the workpiece 12, and through the cooperation of the first positioning component 13 and the second positioning component 14 to position the workpiece 12, can realize the positioning of workpieces 12 of different sizes, improve the stability of the welding process of the workpiece 12, ensure the welding quality and welding efficiency, thus facilitating the realization of automatic welding and having high safety.

[0016] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above-mentioned exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present utility model. Any reference signs in the claims should not be regarded as limiting the claimed rights.

[0017] In addition, it should be understood that although this specification is described according to the embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An automatic welding device for large workpieces, characterized in that: It includes a three-axis platform and a welding robot installed on the three-axis platform, head and tail positioners are provided at both ends below the three-axis platform, connecting boxes are installed on the head and tail positioners, rotating beams are connected between the lower parts of the connecting boxes at both ends, a rotating table is installed on the rotating beam, the rotating table is connected to a driving motor installed on the rotating beam, a bottom plate is installed on the rotating table, a workpiece is placed on the bottom plate, and a positioning component for positioning the workpiece is provided on the bottom plate.

2. The automatic welding device for large workpieces according to claim 1, characterized in that: The positioning assembly is divided into a first positioning assembly and a second positioning assembly. The first positioning assembly and the second positioning assembly are assembled on the bottom plate of the outer ring of the workpiece at intervals.

3. The automatic welding device for large workpieces according to claim 2, characterized in that: The first positioning assembly includes a stud, a bolt column, and a pressure plate. The pressure plate is provided with a through hole and a waist-shaped hole. The top end of the stud passes through the through hole, and the top end of the bolt column passes through the waist-shaped hole and is locked by a nut.

4. The automatic welding device for large workpieces according to claim 2, characterized in that: The second positioning assembly includes a retaining block, which is fixed to the bottom plate. A screw hole is provided on the retaining block. A screw rod is threadedly connected in the screw hole. A tightening block is installed at one end of the screw rod, and a screw rod is installed at the other end of the screw rod.

5. The automatic welding device for large workpieces according to claim 1, characterized in that: The three-axis platform includes an X-axis walking axis, a Y-axis walking axis slidably mounted on the X-axis walking axis, and a Z-axis walking axis slidably mounted on the Y-axis walking axis. The X-axis walking axis is mounted on a gantry, and the welding robot is rotatably mounted on the Z-axis walking axis.

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